Mentor Graphics’ Constraint Editor System has extensive capabilities for importing and exporting constraint data, as well as reusing constraint data. However, in recent discussion with customers, we’ve found that there are several use cases where the existing mechanisms don’t meet the needs well.
Mentor plans to implement the use case of generic import of constraints into CES and would like to hear from users if this meets their needs to import data into CES.
The rough plan is to allow CES users to import data from sources which are convenient for customers. We are considering .csv (comma separated values) file as an input file generated for example from Excel as the most often used one.
We will not allow import of layers stackup or connectivity while we will allow an import of their constraints.
CES will not import:
o Layout data (via definitions, stackup definition)
o Connectivity (electrical nets, differential pairs definitions, pin pairs, from-tos)
CES will import:
o Physical rules representing routing technology guidelines (net classes, clearance rules, area schemes)
o Constraints related to stackup and connectivity
Before import is started CES will backup data.
Until import operation is finished and user confirms its correctness CES will not update iCDB database and keep the data locked.
Users will be able to (via xml configuration file) choose which column should be imported and how they map to CES rules.
During the entire import process CES will maintain data integrity and fill in missing relationships with needed values (either selected by user or technology defaults).
CES import will be available either from CES user interface or from the command line tool to allow batch processing. User will be able to seed more than one design using generic import process.
After import is finished CES will generate a report file with data logs and eventually highlight issues for review.
We encourage you to post your comments about the desired data flow and your data import scenarios…. Thanks!